Abstract：This paper analyzes the dynamics of an LCL-S based inductive power transfer (IPT) system, and aims to improve its reference tracking performance by using a digital PI controller. Firstly, The large-signal model of the IPT system and the steady-state operating point are derived with the help of the generalized state-space averaging (GSSA) technique. Based on the previous work, the small-signal model is established to describe how the load voltage will react to a perturbation in its input. Comparing the step response of the small-signal model with the output of the experimental setup, the small-signal model is nearly identical to the system dynamics. In other words, the proposed small-signal model can describe the prototype well. Then, the Matalab’s PIDtool design toolbox is used to generate suitable PI controller parameters for a fast response time in the load voltage according to the small-signal model. Finally, experiments prove that the closed-loop digital PI controller is designed to ensure a fast response time of approximately 12 ms in the load voltage step change.
林天仁, 李勇, 麦瑞坤. 基于LCL-S拓扑的感应电能传输系统的建模与控制方法[J]. 电工技术学报, 2018, 33(1): 104-111.
Lin Tianren, Li Yong, Mai Ruikun. Modeling and Control Method of Inductive Power Transfer System Based on LCL-S Topology. Transactions of China Electrotechnical Society, 2018, 33(1): 104-111.
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2018, Vol. 33 
